https://avnewsonline.com/shure-distribution-uk-sduk/
Shure Distribution UK (SDUK) - AV News
Jun 3, 2016 - Kevin Beazley assumes role of Conferencing Systems Manager with the Shure Systems Group.
av newsshuredistributionsduk
https://www.antique-prints-maps.com/acatalog/St-Petersburg---SDUK-2349329.html
St Petersburg SDUK (antique map)
st petersburgsdukantiquemap